#!/bin/bash
#truyen` duong` dan~ den' file can` in ra chu~ hoa
content=$(cat $1)
echo "$content" | tr "[a-z]" "[A-Z]"	#	" echo $content " co' tac' dung. nhu dau` vao` cua? tr
#phai? cho $content vo trong dau' ngoac. vi` no' se~ in ra ca? ky' tu. xuong' dong`
#co' the? viet' gon. trong 1 dong` lenh. nhu sau : 			echo "$(cat $1 | tr \"[a-z]\" \"[A-Z]\")"
#echo "$(cat $1 | tr \"[a-z]\" \"[A-Z]\")"

